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bv and gc of literals (#4692)

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* bv and gc of literals

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* overload

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* diseq

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* diseq

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2020-09-17 14:24:07 -07:00 • committed by GitHub
parent 2d52367368
commit 549753845e
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34 changed files with 1480 additions and 854 deletions
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15
src/sat/sat_clause.h
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@ -165,6 +165,7 @@ namespace sat {
explicit clause_wrapper(clause & c):m_cls(&c), m_l2_idx(null_literal.to_uint()) {}
bool is_binary() const { return m_l2_idx != null_literal.to_uint(); }
bool is_ternary() const { return size() == 3; }
unsigned size() const { return is_binary() ? 2 : m_cls->size(); }
literal operator[](unsigned idx) const {
SASSERT(idx < size());
@ -178,6 +179,20 @@ namespace sat {
bool contains(bool_var v) const;
clause * get_clause() const { SASSERT(!is_binary()); return m_cls; }
bool was_removed() const { return !is_binary() && get_clause()->was_removed(); }
bool is_learned() const { return !is_binary() && get_clause()->is_learned(); }
class iterator {
unsigned m_idx;
clause_wrapper const& m_cw;
public:
iterator(clause_wrapper const& c, unsigned idx): m_idx(idx), m_cw(c) {}
iterator& operator++() { ++m_idx; return *this; }
literal operator*() { return m_cw[m_idx]; }
bool operator==(iterator const& other) const { SASSERT(&m_cw == &other.m_cw); return m_idx == other.m_idx; }
bool operator!=(iterator const& other) const { SASSERT(&m_cw == &other.m_cw); return m_idx != other.m_idx; }
};
iterator begin() const { return iterator(*this, 0); }
iterator end() const { return iterator(*this, size()); }
};
typedef svector<clause_wrapper> clause_wrapper_vector;